Audio protection with removable watermarking

Abstract

Abstract-A perceptible removable watermark can be used to add copyright owner's identification to media or lower the value of the digital contents. The application scenario for perceptible watermarks is to give the protected contents available freely for download as a preview. For a fee, the watermark can be removed to restore the media quality to the original level. We present a scheme to protect the audio data by embedding high capacity robust watermark to it. The watermark can be removed using a secret watermarking key with only minimal remaining distortion. The protection watermark embedding and detection is done in the spectral domain. The watermark is embedded into selected FFT coefficients' magnitudes of the cover audio using frequency hopping method. The method proposed is media format independent and it can be used with lossy compression. The objective and subjective quality evaluations indicate that the audio quality after watermark removal is excellent.

Removable Watermarking Sebagai Pengendalian Terhadap Cyber Crime Pada Audio Digital

“…Penelitian terkait removable watermarking telah dilakukan pada [2]- [9]. Pada [2]- [3] dibahas proses removable watermaking dengan merepresentasikan skema untuk proses penyisipan watermark terlebih dahulu, dilanjutkan proses ekstraksi, dan selanjutnya adalah proses removal.…”

Lossless Audio Watermarking Based on the Alpha Statistic Modulation

“…Further, audio watermarking techniques are also classified into reversible or irreversible techniques based on the possibility of recovery of original audio after extraction of watermark from the watermarked audio. Although reversible watermarking has been widely researched [5][6][7], the research has mainly been focused on imperceptible reversible image watermarking only. Reversible watermarking enables the embedding of useful information in a host signal without any loss of host information.…”

“…Reversible watermarking enables the embedding of useful information in a host signal without any loss of host information. In [7], the watermark is embedded into selected FFT coefficients' magnitudes of the cover audio using frequency hopping method. However, the embedded watermark is perceptible unless it is removed and original audio is extracted using watermarking secret key.…”

“…Time domain techniques [4][5][6][7][8]13] are simple to realize, but they are less robust compared to transform domain techniques. In transform domain techniques, the host signal is transformed into the transform domain and the watermark is embedded into the transform domain coefficients [3,8,[10][11][12].…”

“…However, the embedded watermark is perceptible unless it is removed and original audio is extracted using watermarking secret key. Also most of these reversible techniques are semi-fragile or less robust in nature [5][6][7].…”